I am developing what is essentially a USB soundcard using a K60 device. I am a little concerned about how to sync the USB packet rate from the PC through the K60 to the hardware codec connected to it with I2S. I have read that adaptive or aynchronous modes of the USB audio class are the way to go for low jitter and high quality reproduction.
Competitors' offerings contain a PLL which synchronises the 1ms SOF packets and the codec Master Clock. Does Kinetis have this functionality? If not, how would synchronisation be implemented?